The point of the permanent thread was to consolidate many different threads that were titled by month or period (which always fall off when they expire). It worked very well and brought a lot of people together especially when the timelines went out past 50BD.
Separating it out by "fall timelines Oct-Dec" is daft. It fragments the advice, means people have to search multiple threads (clearly already happening) and makes it harder for the experts (especially ksand, larrabee and kfdancer) to keep track and give advice.
It also means searching for different data for the timeline becomes inefficient, longer and is more prone to missing updates.
One permanent thread also helps avoid un-necessary repetition and provides one point of reference. Taking the consolidated averages since March with a finite end point of Dec doesn't make sense.
Just my thoughts... Good luck.